For each size, the number of stitches cast on is the same, but the needle size changes.

Gauge/Tension
12½ stitches and 17 rows to two square inches on UK No 10 needles (US3/3.25mm), in stocking stitch
12 stitches and 16 rows to two square inches on UK No 9 needles (US5/3.75mm), in stocking stitch
11½ stitches and 15 rows to two square inches on UK No 8 needles (US6/4mm), in stocking stitch

Measurements
Headband (slightly stretched)
19, 20, 21 in

Materials
Patons Fiona (all sizes)
Natural 1 X 2 oz ball
Brown oddment
Yellow oddment
Green oddment
Red oddment
Blue oddment
White oddment
Set of four needles with points at both ends.